According to NASA, an asteroid big enough to kill millions of people is on its way to Earth. However, it's expected to brush past, missing by 25 kilometers, which is considered a narrow distance by NASA. This large object being called Asteroid 86666 was first discovered 16 years ago, and has been kept under observation ever since. It's predicted to pass the Earth today, making it one of the largest asteroids to approach our planet. While the rock's exact size is unknown, estimates claim it could be as wide as 2.6 kilometers.
Read about the asteroids potential impact on the next page.